Shock-absorber.



A. DUI'RIBUX.

. SHOCK ABSORBBR.

APPLICATION FILED AUG.14, 1907.

PATENTED JUNE 23, 1908.

ARTHUR DUTRIEUX, OF LE lQUESNOY, FRANCE.

SHOCK-.AB SORBER.

Specification of Letters Ilatent Patented June sa, isos.

Application sied August 14, 1907. semi No. sssgsea To all whom 'it may concern:

Be it known that I, ARTHUR DUTRiEUx, a citizen of the Republic of France, and a resident of Le Quesnoy, N 0rd,'France, have invented certain new and useful Improvements in Shock-Absorbers, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it a pertains to carry out the same.

'llhe object of this invention is an apparatus designed to. deaden the reaction-s of the springs in automobile and other vehicles andj es ecially to prevent the-suddenreturn or re axation of the compressed sprin s at the same time permitting them to rig t themselves slowly;` y

The apparatus is also arran ed in such a lmanner as not to oppose itse to the small vibrations of the s The invention will rin s.

be fully described with reference to the accompanying drawin Figure 1 is a diagrammatic view o the apparatus showing the mlethodj of'iixmg 1t Ls of a sector shape and is fixed to the frame 18 of the vehicle. This chamber incloses a win 1 which acts as a piston, The piston oscillates in the interior of the box 14 which is :filled with any suitable liquid such as oil,

a mixture of water and glycerin, ser-niv` solid grease or the like, and to permit the liquid\to pass from one side of thel iston to the other, a number of holes suitab y arra'nged are made in the piston in such a man'- -ner that the liquid passes'easily in one direction but only direction. v

The piston 1 in order to oscllate under the influence of the movementsof the springs is mounted on a shaft 2 on the ,outer endf of with diliculty in the opposite which is ixed a lever 1 9'. A ,link 20 is pivf,A

oted at one of itsfeii'ds to a convenient part of the lever 19 `andgatits other end 1s connectedto the axle 21 or toits point of attachment to the spring. 2 2.

The wing or pistn 1 mounted on a spindle or shaft traverse it from side to side. On one of the (Fi 4) is pierced with two an -10 which coincide with make themcorrespond a safety valve indicated to give a suppl vto the kframe of the vehicle and its connection of the spin principally of a, box or chamber 14 which seen from the front minished by the 2 is pierced with holes 3 which faces of the pistoni are xed by vittteal'ls of rivets 4 three flexible plates 5, 6, 7`, of unsf equal length and of which each. partly covers the other. These plates are slightly curved in such a manner as to allow the holes 3 of the piston toI bev clear or free. Small bars' or stops 8 limit the o ening of the plates and prevent their being hroken as the resultof a too sudden push of the liquid. The 'late 7 ranges of 'cles 9' two ofthe ranges of holes of the piston. The pfate 6 is pierced with one range of' holes 11` which coincide with the range of holes 10 ofthe plate 7"; and the plate 5 is pierced with one hole 12 which corresponds with one of the holesll of the plate 6. The numbers of holes are given only by way of exa-m le and they may bevaried at will, the o` necessity bein toI with one anot" er. It is also preferable to'arrange in the piston ementary passage to the of a very'suddencom resliquid in the case damage or even hren: the

sion which might apparatus.

supplementary passage forl the` liquid from onesideto thel other of' the piston isfurnished b ,a channel 15 surrounding a part e 2. The passing'of. the liquid can be regulated by the throufgh this channel aid o a screw 16 which permits of increasing or diminishing the resistance of the flow.

of the li uid through the channel.

The ing u of the box or chamber takes place by an or` ce closeclb The operation is asfo vibrations of the s rin small oscillations of t plates 5, Gand 7 not themselves the li uid one side to the ot er o ows: Tothe small vonly correspond e plstoi .1, the flexible having time to `close passes through from the piston, through at 13, and destineda screwstopper 17.

all the holes such as 3 'which are formedl l therein. The

s rin can tliusfreelP fuliil its function. g y

e vibration is however` diresistance which the liquid encounters in its passage through the holes of. the piston. To permit small oscillations of the; spring to lbe reduced 'more freely, grooves 23 are forme in the side of the lateralface' ofthe box or chamberto furnish a supplementary passage to the liquid .and oppose less 'resistance'to'the small vibrations of the spring. vIf one sup' oses a greater co`m'' pression of the springt e piston 1 is moved more quickly in the direction indicated by the arrow at the moment of righting itself7 and the plate 7 which is the most flexible because of its greater length will be applied against the piston and Will close the oles with the exception of the two ranges corresponding to the ranges of holes 9 and 10 of t e plate 7, the liquid only being able to flow by six holes will create a resistance which will diminish the speed of the return of the sprin' If the compression of the spring be stI Greater which causes a return still more sudden the plate 6 will enter into play anda ply itselfu on the plate? and there will be on y three ho es 11 which allow passage to the liquid. In the last lace the plate 5 will also enter into play an the liquid Will only be able to pass by the hole 12. It will be seen then that this arrangement of plates acts automatically and creates an increasing obstacle to the return of the spring the more energetic according as the return of the sprin tends to be more sudden. It is to be remar ed that the return of the spring is not stopped but only the sudden return or relaxation because the small lates are a plied on the piston to close t e holes on y when the spring in righting itself exerts a certain speed.

The numbers of plates as Well as the numbers of holes may be varied according to the importance of the vehicle to which the deadener is to be applied. The plates also may be replaced by asystem of valves or other appropr1ate arrangements closing themselves progressively according to the rapidity of displacement of the piston. Though this system of clacks or Stoppers has been shown ap- `suchsudden return and to plied to a piston in the form of a wing it may also be applied to all other kinds of pistons.

The apparatus describedv has been speciall arranged to serve to attenuate and to dea en the vibrations of the sudden return of the sprin of automobile vehicles but it can equally e applied to all kinds of vehicles and even to machines and apparatus of all kinds where it is advantageous to make use of a deadening apparatus acting progressively. p

Having now particularly described and ascertained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is An apparatus for deadening the sudden return of s rings in which a piston 1 is formed wit holes 3 and provided on one of its faces with small elastic plates, also pierced with corresponding holes, of which t enumber decreases with each plate and each of which lates partially covers the other, the said p ates having one of their extremities fixed to the piston and the others standing away in such a fashion that they apply themselves successively u on the piston according to the suddenness o the return of the sprlng to oppose themselves to ermitits slow return substantially as described.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

ARTHUR DUTRIEUX.

Witnesses:

CHARLES DEFAUX, LAURENT BRICKY. 

